
1
Data sheet acquired from Harris Semiconductor
SCHS167A
Features
• HC/HCT240 Inverting
• HC/HCT241 Non-Inverting
• HC/HCT244 Non-Inverting
• Typical Propagation Delay = 8ns at VCC = 5V,
CL = 15pF, TA = 25oC for HC240
• Three-State Outputs
• Buffered Inputs
• High-Current Bus Driver Outputs
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating T emperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il≤1µA at VOL, VOH
Description
The ’HC240 and ’HCT240 are inverting three-state buffers
having two active-low output enables. The CD74HC241,
’HCT241, ’HC244 and ’HCT244 are non-inverting three-
state buffers that differ only in that the 241 has one active-
high and one active-low output enable, and the 244 has two
active-low output enables. All three types have identical
pinouts.
Ordering Information
PART NUMBER TEMP. RANGE
(oC) PACKAGE
CD54HC240F3A -55 to 125 20 Ld CERDIP
CD74HC240E -55 to 125 20 Ld PDIP
CD74HC240M -55 to 125 20 Ld SOIC
CD54HCT240F3A -55 to 125 20 Ld CERDIP
CD74HCT240E -55 to 125 20 Ld PDIP
CD74HCT240M -55 to 125 20 Ld SOIC
CD74HC241E -55 to 125 20 Ld PDIP
CD54HCT241F3A -55 to 125 20 Ld CERDIP
CD74HCT241E -55 to 125 20 Ld PDIP
CD74HCT241M -55 to 125 20 Ld SOIC
CD54HC244F -55 to 125 20 Ld CERDIP
CD54HC244F3A -55 to 125 20 Ld CERDIP
CD74HC244E -55 to 125 20 Ld PDIP
CD74HC244M -55 to 125 20 Ld SOIC
CD54HCT244F -55 to 125 20 Ld CERDIP
CD54HCT244F3A -55 to 125 20 Ld CERDIP
CD74HCT244E -55 to 125 20 Ld PDIP
CD74HCT244M -55 to 125 20 Ld SOIC
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer and die for this part number is available which meets all
electrical specifications. Please contact your local TI sales office
or customer service for ordering information.
November 1997 - Revised May 2000
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2000, Texas Instruments Incorporated
CD54/74HC240, CD54/74HCT240,
CD74HC241, CD54/74HCT241,
CD54/74HC244, CD54/74HCT244
High Speed CMOS Logic
Octal Buffer/Line Drivers, Three-State
[ /Title
(CD74
HC240
,
CD74
HCT24
0,
CD74
HC241
,
CD74
HCT24
1,
CD74
HC244
,
CD74